<%@ page import="java.util.List" %>
<%@ page import="java.util.ArrayList" %>
<%@ page import="javax.xml.transform.Result" %>

<%@ page import="java.sql.*" %>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>

<html>
<head>
    <title>Title</title>
  <meta charset="UTF-8">
</head>
<body>
<style type="text/css">
            table{
      border-collapse: collapse;
    }
      td{
      border:1px  solid #000;
      padding: 10px;
    }
</style>
<!--include 动作-->

<h1>用户管理系统</h1>
<a href="userAdd.jsp">添加用户</a>
<table>
    <tr>
        <td>编号</td>
        <td>姓名</td>
        <td>密码</td>
        <td>操作1</td><!--ctrl+d(复制)--><!--ctrl+w(选择)-->
        <td>操作2</td>
    </tr>
  <%
    class User{
      int id;
      String name;
      String password;
    }
    List<User> userList = new ArrayList<User>();
    //User chen=new User();
    //chen.id=1;
    //chen.name="chengongsuo";
    //chen.password"123";
    //userList.add(chen);
    //3+1
    Connection connection=null;
    Statement statement=null;
    ResultSet resultSet=null;
    String sql="select * from t_users";
    //加载驱动程序
    Class.forName("com.mysql.cj.jdbc.Driver");
    connection= DriverManager.getConnection(
            "jdbc:mysql://localhost:3306/sctu_javaweb_2018?serverTimezone=UTC",
            "root",
            "123456");
    statement=connection.createStatement();
    resultSet=statement.executeQuery(sql);
    while(resultSet.next()){
      int id=resultSet.getInt(1);
      String name=resultSet.getString(2);
      String password=resultSet.getString(3);
      User user=new User();
      user.id=id;
      user.name=name;
      user.password=password;
      userList.add(user);
    }
    resultSet.close();
    statement.close();
    resultSet.close();
    for(User user:userList){
      //221
      //2 ""
      //2  +
      //1 变量
      out.write("<tr>"+
              "<td>"+user.id+"</td>"+
              "<td>"+user.name+"</td>"+
              "<td>"+user.password+"</td>"+
              "<td><a href='UserDelete.jsp?id="+user.id+"'>删除</a></td>"+
              "<td><a href='UserUpdata.jsp?id="+user.id+"&username="+user.name+"&password="+user.password+"'>更新</a></td>"+
              "</tr>");
    }
  %>
  </table>
  <!--include指令-->

  </body>
</html>

